What type of change is needed to break down a compound

Why are some atoms radioactive

Anna heated 15 g of Substance A to obtain 5 g of Substance B, 4 g of Substance C, and a certain amount of Substance D. Which statement is correct? The mass of Substance D was 10 g less than the mass of Substance A.

How do you find the force on an object using distance and time

With certain exceptions, Class E airspace extends upward from either 700 feet or 1,200 feet AGL to, but does not include, A) 14,500 feet MSL. * B) 18,000 feet MSL. C) 10,000 feet MSL.

Two rooms A and B are 12.5m and 25m long in which room u will get the effect echo and why

What should a free-body diagram look like for a skydiver that is still speeding up as he falls? There is an arrow up for air resistance and an arrow down for gravity. The arrows are the same length.

As a rocket moves farther and farther upward from the launch pad, what happens to the strength of Earth's gravitational field around the rocket? a. It gets weaker. b. It grows stronger. c. It remains constant.

Sully uses a battery and a coil of wire to create an electromagnet. Using the same materials, if he wants to increase the strength of his electromagnet, he must the number of loops in the coil of wire along its length.

How long does it take for light from a star that is 8 light years away to reach Earth? Question 7 options: 8 earth minutes 16 earth minutes 8 earth years 16 earth years

Why does water in hot springs always remain hot? Why doesn't it's thermal energy spread out?